lustrum

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈlʌstrəm/US:USA pronunciation: respellingUSA pronunciation: respelling(lus′trəm)

Inflections of 'lustrum' (n):
lustrums
npl
lustra
npl

WordReference Random House Unabridged Dictionary of American English © 2025
lus•trum  (lus′trəm),USA pronunciation n., pl. -trums, -tra (-trə).USA pronunciation 
  1. British TermsAlso, luster;
     [esp. Brit.,] lustre. a period of five years.
  2. Antiquity, Ancient History[Rom. Hist.]a lustration or ceremonial purification of the people, performed every five years, after the taking of the census.
  • Latin lūstrum; compare luster1
  • 1580–90

Collins Concise English Dictionary © HarperCollins Publishers::
lustrum / ˈlʌstrəm/, lustre ( -trums, -tra / -trə/)
  1. a period of five years
Etymology: 16th Century: from Latin: ceremony of purification, from lustrāre to brighten, purify
'lustrum' also found in these entries (note: many are not synonyms or translations):
illustrate - indiction - luster - lustral - lustre - pollute

Forum discussions with the word(s) "lustrum" in the title:


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